昆仑山口西8.1级大地震震后库赛湖地区多时相InSAR地表形变遥感探测
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摘要
利用2003年~2007年间14景欧空局ENVISAT ASAR卫星数据,结合SRTM DEM数据,采用多时相SAR协同配准方法进行二路干涉处理,对2001年11月昆仑山口西8.1级大地震宏观震中—库赛湖地区的地表形变场进行了多时相探测。结果表明:①多时相InSAR技术能够对位于高海拔山区的东昆仑断裂带库赛湖段的地表形变实施连续监测;②震后发震断裂带的调整活动经历了一个动态变化的过程,2003年~2004年、2005年9月至2006年2月相对活跃,调整幅度较大,2004年11月至2005年9月间调整较小;③2006年~2007年发震断裂带地区活动逐渐减弱。
14 scenes of ENVISAT ASAR data acquired from 2003 to 2007 are adopted in this research to study the post-seismic surface deformation in Kusai Lake region after the 2001 Ms 8.1 Kunlun earthquake.SRTM DEM data are included and the cooperative SAR image registration method is used for pre-processing of multi-temporal ASAR data in later two-pass differential InSAR pairs.The results showed that:(1)cooperative registering multi-temporal InSAR is an efficient tool for continuous surface deformation detection in this area.(2)The post-seismic deformation adjustment of the rupture belt is a dynamic process.During the period of 2003,2004 and from Sep.2005 to Feb.2006,the amplitude of adjustment was large.The rupture belt was relatively stable during the period from Nov.2004 to Sep.2005.(3)In 2006 and 2007,the adjustment was weakening gradually.
14 scenes of ENVISAT ASAR data acquired from 2003 to 2007 are adopted in this research to study the post-seismic surface deformation in Kusai Lake region after the 2001 Ms 8.1 Kunlun earthquake.SRTM DEM data are included and the cooperative SAR image registration method is used for pre-processing of multi-temporal ASAR data in later two-pass differential InSAR pairs.The results showed that:(1)cooperative registering multi-temporal InSAR is an efficient tool for continuous surface deformation detection in this area.(2)The post-seismic deformation adjustment of the rupture belt is a dynamic process.During the period of 2003,2004 and from Sep.2005 to Feb.2006,the amplitude of adjustment was large.The rupture belt was relatively stable during the period from Nov.2004 to Sep.2005.(3)In 2006 and 2007,the adjustment was weakening gradually.
引文
1中国地震局监测预报司.2001年昆仑山口西8.1级大地震[M].北京:地震出版社,2002.
2徐锡伟,陈文彬,于贵华,等.2001年11月14日昆仑山库赛湖地层(Ms 8.1)地表破裂带的基本特征[J].地震地质,2002,24(1):1~13.
3王超,张红,刘智.星载合成孔径雷达干涉测量[M].北京:科学出版社,2002.
4张艳梅,程晓,李斐.基于SRTM DEM的二路重轨DINSAR地震形变探测———以2001年昆仑山口西MS8.1大地震震中为例[J],地震,2005,24(4):105~111.
5张艳梅,江在森,李斐,等.基于DINSAR的2001年昆仑山口西8.1级大地震形变探测[J].大地测量与地球动力学,2007,27(3):12~17.
6马超,单新建.基于实测值分段线性内插模型的InSAR视线向同震位错分解—以青藏高原昆仑山Ms8.1地震为例[J].地震学报,2006,28(1):98~104.
7杨国华,张晓东,张风霜,等.昆仑山口西8.1级地震震后中国西部地壳水平位移场的变化特征[J].地震研究,2008,31(1):77~82.
8 Hanssen R F.Radar Interferometry-Data Interpretation and Error Analysis[M].Kluwer Academic Publishers,2001.
9廖明生,林晖.雷达干涉测量-原理与信号处理基础[M].北京:测绘出版社,2003.
2徐锡伟,陈文彬,于贵华,等.2001年11月14日昆仑山库赛湖地层(Ms 8.1)地表破裂带的基本特征[J].地震地质,2002,24(1):1~13.
3王超,张红,刘智.星载合成孔径雷达干涉测量[M].北京:科学出版社,2002.
4张艳梅,程晓,李斐.基于SRTM DEM的二路重轨DINSAR地震形变探测———以2001年昆仑山口西MS8.1大地震震中为例[J],地震,2005,24(4):105~111.
5张艳梅,江在森,李斐,等.基于DINSAR的2001年昆仑山口西8.1级大地震形变探测[J].大地测量与地球动力学,2007,27(3):12~17.
6马超,单新建.基于实测值分段线性内插模型的InSAR视线向同震位错分解—以青藏高原昆仑山Ms8.1地震为例[J].地震学报,2006,28(1):98~104.
7杨国华,张晓东,张风霜,等.昆仑山口西8.1级地震震后中国西部地壳水平位移场的变化特征[J].地震研究,2008,31(1):77~82.
8 Hanssen R F.Radar Interferometry-Data Interpretation and Error Analysis[M].Kluwer Academic Publishers,2001.
9廖明生,林晖.雷达干涉测量-原理与信号处理基础[M].北京:测绘出版社,2003.
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